A dialog unit is based on the system font and its relationship to pixels can be determined though the win32 sdk function 对话框单位基于系统字体,它与像素的关系可以通过win32 sdk函数
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The windows operating system supports automatic scaling of dialog boxes using a relative unit of measurement called dialog units Windows操作系统支持使用一种被称为对话框单位的相对度量单位自动对对话框进行缩放。